package com.lhk.controller;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        //登录成功之后，应该有用户的session
        Object loginUser = request.getSession().getAttribute("loginUser");
        if(loginUser == null){ //没有登录
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/index.html").forward(request, response);
            return false;
        }else {
            return  true;
        }


    }
}
